RRDDUMP(1)                           rrdtool                          RRDDUMP(1)

NAME
     rrddump - dump the contents of an RRD to XML format

SYNOPSIS
     rrdtool   dump   filename.rrd  [filename.xml]  [--header|-h {none,xsd,dtd}]
     [--no-header|-n] [--daemon|-d address] [> filename.xml]

DESCRIPTION
     The dump function writes the contents of an RRD in human readable  (?)  XML
     format  to  a file or to stdout. This format can be read by rrdrestore. To‐
     gether they allow you to transfer your files from one computer architecture
     to another as well to manipulate the contents of an RRD file in a  somewhat
     more convenient manner.

     filename.rrd
             The name of the RRD you want to dump.

     filename.xml
             The  (optional)  filename that you want to write the XML output to.
             If not specified, the XML will be printed to stdout.

     --header|-h {none,xsd,dtd}
             By default RRDtool will add a dtd header to the xml file. Here  you
             can customize this to and xsd header or no header at all.

     --no-header|-n
             A shortcut for --header=none.

             If you want to restore the dump with RRDtool 1.2 you should use the
             --no-header option since 1.2 cannot deal with xml headers.

     --daemon|-d address
             Address of the rrdcached daemon. If specified, a "flush" command is
             sent  to  the server before reading the RRD files. This allows rrd‐
             tool to return fresh data even if the daemon is configured to cache
             values for a long time.  When specified the RRD filename  signifies
             a server side file, but the output (XML) filename refers to the lo‐
             cal side.  For a list of accepted formats, see the -l option in the
             rrdcached manual.

              rrdtool dump --daemon unix:/var/run/rrdcached.sock /var/lib/rrd/foo.rrd

EXAMPLES
     To transfer an RRD between architectures, follow these steps:

     1.  On  the  same system where the RRD was created, use rrdtool dump to ex‐
         port the data to XML format.

     2.  Transfer the XML dump to the target system.

     3.  Run rrdtool restore to  create  a  new  RRD  from  the  XML  dump.  See
         rrdrestore for details.

ENVIRONMENT VARIABLES
     The  following  environment variables may be used to change the behavior of
     "rrdtool dump":

     RRDCACHED_ADDRESS
         If this environment variable is set it will have  the  same  effect  as
         specifying  the  "--daemon"  option  on  the  command line. If both are
         present, the command line argument takes precedence.

AUTHOR
     Tobias Oetiker <tobi@oetiker.ch>

1.11.0                             2026-08-08                         RRDDUMP(1)
